I'm a pretty big server. The advantage it has given me is that it allows the rest of my game to completely suck and I still have a chance to win if I can steal a couple of breaks.
Having a good serve allows me to play longer matches, get into more rallies, get a great workout, work on my forehand/backhand.
Thank goodness for my serve. Or else some days, I'd be losing 6-2, 6-1 after one hour.
2015 Babolat AeroPro Drive
VS Gut Mains 16g @ 56lbs / RPM Blast Crosses 17g @ 54lbs